Support for JSON data collection rule log_file format

[doka380]

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Description

The current documentation says the only possible format for log_file is "text". If there are no other ways to collect JSON log files except specifying "json" format (which is supported by ARM template), can this be added?

New or Affected Resource(s)/Data Source(s)

azurerm_monitor_data_collection_rule

Potential Terraform Configuration

resource "azurerm_monitor_data_collection_rule" "example" {
  name                        = "example-rule"
  [ ... ]

  data_sources {
    log_file {
      name          = "example-datasource-jsonlogfile"
      format        = "json"
      streams       = ["Custom-MyTableJsonData"]
      file_patterns = ["/var/log/jsonlog.log"]
    }

### References

_No response_